Reroot the exception hierarchy into a toplevel Exception class

As the alternatives are unfortunate for applications trying to catch
all library errors, and it seems deriving from std::runtime_error
causes problems with MSVC DLLs (GH #340)

Effectively reverts 2837e915d82e43

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/modes/aead/gcm/gcm.cpp b/src/lib/modes/aead/gcm/gcm.cpp
index 15820069d..a77c3e4d4 100644
--- a/src/lib/modes/aead/gcm/gcm.cpp
+++ b/src/lib/modes/aead/gcm/gcm.cpp
@@ -163,7 +163,7 @@ GCM_Mode::GCM_Mode(BlockCipher* cipher, size_t tag_size) :
    m_cipher_name(cipher->name())
    {
    if(cipher->block_size() != BS)
-      throw std::invalid_argument("GCM requires a 128 bit cipher so cannot be used with " +
+      throw Invalid_Argument("GCM requires a 128 bit cipher so cannot be used with " +
                                   cipher->name());
 
    m_ghash.reset(new GHASH);